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Mathematical modeling a: crop processing and storage
Objective function:

Maximum z = 4.8 (x11+x 21)+5.6 (x12+x22)-c (x)

Where c(x) is a piecewise function;

Constraints:

The optimal solution obtained by using LINDO software is:

Buy A 1000 tons, and produce 2,500 tons with your own, with a profit of 5,000,000 yuan.

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